The state project will look at all infant deaths during 1990.
The virus is a leading cause of infant death in third world countries.
Speaking of the five infant deaths, he added, "Did the workers do what they should have?"
Car crashes are the leading cause of infant deaths in America.
The rate in 1990 had been 40.0 infant deaths per 1,000 births.
The year before, there were 742 infant deaths and 122,937 live births.
Brazil had the worst reported figure of 32.5 infant deaths per 1,000.
"Many of the reasons known for infant death relate to poverty," she said.
None of the families interviewed had experienced a sudden infant death.
Before people had made the connection between hand washing and infant deaths?